Rotary engine



J. H. BLAKE. Rotary Engine.

No. 228,861. Patented June 15, 1880.

WITNESSES a, /w/M ATTORNEYS.

UNITED STATES PATENT Fries.

JOHN H. BLAKE, OF BATAVIA, NEW YORK.

ROTARY ENGINE.

SPECIFICATION forming part of Letters Patent No. 228,861, dated June 15,1880.

Application filed November 3, 1879.

To all whom it may concern:

Be it'known that 1, JOHN H. BLAKE, of Batavia, in the county of Geneseeand State of New York, have invented a new and Improved Rotary Engine,of which the following is a specification.

Figure 1 is an end elevation. Fig. 2 is a sectional end elevation online as a, Fig. 3. Fig. 3 is a sectional front elevation. Fig. 4represents front and end views of the dog in position.

Similar letters of reference indicate corresponding parts.

The object of this invention is to provide a cheap and efficient rotaryengine that consists of few parts and is economical in the consumptionof steam.

The invention consists of an adjustable abutment, of a spring andcrank-shaft for effecting the movement of the abutment, and of a rotaryvalve of simple construction.

In the drawings, A represents the enginecylinder. B B are the pistonsfixed eccentrically on the shaft 0, that passes through the heads D D ofthe cylinder A, and also relatively eccentric to each other.

E is a disk fixed centrally on the shaft 0, between the pistons B B, andserving to divide the cylinder A into two interior chambers, and servingalso to carry proper packingrings on its periphery and about the shaft0, to prevent the escape of steam from one chamber to the other.

F is a rotary valve, which is cylindrical at the center of its length,so as to divide the valve-chamber G into two equal parts, and cut awayto half its diameter at those parts that open and close the steam-portsof the engine,

thus making in effect a double valve. The

ends of this valve F are journaled in the cylinder-heads D D, so that it(the valve F) may, by suitable gear-wheel or other suitable engineconnections secured on its outer end or ends, be made to revolve for theproper regulation of the steam-supply to the engine.

H H are the swinging abutments, having shoulders to projecting from themat right angles, and made adjustable in the groove I) of the cylindricalrocking hinge l by the key 0.

A short shaft, K, passes through the cylinder=head D, and has fastenedon its inner end a dog, L, that enters the end of the groove 7) of thehinge I. On the outer end of this shaft K the crank-lever M is securedby set-screw d, or other convenient device, while the other end of thelever M is pivoted on pin f between the forks of the rod N, whose lowerend passes through the lug O, which is fastened upon the cylinder headD. A spring, P, is coiled around the rod N. This device of shaft K, dogL, lever M, rod N, and spring P, in combination, is'for thepurpose ofchecking the momentum of the abutments H H when they are raised intotheir recesses g g by the action of the pistons B B, and for the furtherpurpose of afterward restoring said abutment's to their primaryposition.

Steam entering the pipe Q when the parts are in the position shown inthe drawings will pass into the valve-chamber G, and thence through theport h into the left-hand chamber of the cylinder A, as shown in Figs. 2and 3; and, as the abutment H is immovable because of the angularcontact of its lower edge with the piston B, the steam will pressagainst and turn the said piston B, and thereby the shaft C and thepiston B, so that the said piston B, in turning, shall come in contactwith the rear of the abutment H and close the said abut-' ment H up intoits recess g, thereby closing the steam-port h, the exhaust-steam at thesame time escaping through the exhaust-port m. The cylinder receivessteam as the adjoining chamber exhausts it, and this reciprocal actioncauses and maintains aconstant rotary motion of the shaft 0 and thepistons B B thereto attached.

When the lower end of the abutment H, bearing on the piston B, becomesworn, the key 0 can be taken out and filed down, so that the saidabutment H may be set farther down, and lining-strips can be inserted inthe space left over the top of the said key 0.

This arrangement does away with packing in the lower end of theabutment, which packing would be liable to fly out and break the engineby getting jammed in the steam-ports.

Each end of the engine is to be provided with the spring-rod andleverdevice for effecting the movement of the abutments, and in thisdouble-chambered engine allthe moving parts and the steam and exhaustports are duplicated.

Having thus described my invention, I

5 claim as new and desire to secure by Letters Patent- 1. In a rotaryengine, the abutment H, provided with shoulder a, and keyed in therocking hinge I by the adjusting-key c, substan- IO tially as hereinshown and described.

2. In combination with the piston of a rotary engine, the hinge I,provided with groove 1) and key 0, in combination with the abutinent Hprovided with shoulder a, shaft K, and dog L, and crank M, rod N, andspring P, substantially as herein shown, and for the purpose described.

JOHN H. BLAKE.

Witnesses:

D. W. ToMLINsoN, JAMES M. HAMILTON.

